161367161731 has 2 divisors, whose sum is σ = 161367161732. Its totient is φ = 161367161730.

The previous prime is 161367161699. The next prime is 161367161743. The reversal of 161367161731 is 137161763161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161367161731 - 2⁵ = 161367161699 is a prime.

It is a super-2 number, since 2×161367161731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161367164731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80683580865 + 80683580866.

It is an arithmetic number, because the mean of its divisors is an integer number (80683580866).

Almost surely, 2^161367161731 is an apocalyptic number.

161367161731 is a deficient number, since it is larger than the sum of its proper divisors (1).

161367161731 is an equidigital number, since it uses as much as digits as its factorization.

161367161731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 43.

The spelling of 161367161731 in words is "one hundred sixty-one billion, three hundred sixty-seven million, one hundred sixty-one thousand, seven hundred thirty-one".